(If you are talking about the Polish Underground during WWII) Founded by Michal Tokarzewski, the Polish Underground was created the help save the live of Poles and Jews during WW II. Its preserved Polish cultural life and was formed as a secret military organization originally. It attempted countless sabotage missions on Germany and its main goal was to take back Poland when it was under rule by Germany and the Soviet Union.
Polish decrees happened in 1940.
War of the Polish Succession happened in 1733.
It would have nail polish on it.
The underground railroad happened in the 1830
The Vinyl Underground happened in 2007-12.
Gotham Underground happened in 2007-12.
Tony Hawk's Underground happened in 2003.
the only thing that will happen is your penny will be filthy with shoe polish.
Uprising of Polish political exiles in Siberia happened on 1866-06-28.
Defense of the Polish Post Office in Danzig happened on 1939-09-01.
something bad will happen that's all I can say.
it will turn into a llama!OMGG